package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.result.Result;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServicelmpl implements UserService {

    public static final String WE_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    public User wechatLogin(UserLoginDTO userLoginDTO) {
        String openid = getOpenId(userLoginDTO.getCode());
        //判断openId是否为空，抛出异常，
if (openid==null){
    throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
}
        //判断当前openId是否在，判断是否是新用户
        User user = userMapper.getByOpenId(openid);
        //如果是则自动完成注册
        if (user==null){
         user=   User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        //返回用户对象
        return user;
    }

    /**
     * 调用微信接口服务，获取微信用户openId
     * @param code
     * @return
     */
    private String getOpenId(String code){
        //调用微信用户接口服务获取当前openId
        Map<String,String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WE_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid=jsonObject.getString("openid");
      return openid;
    }
}
